In honor of World Diabetes Day, here is a map showing the U.S. prevalence of diabetes along with diabetes clinical research sites. You can view diabetes prevalence by percent, diabetes density per square mile, or raw number of cases in each county. Circles with numbers represent clusters of multiple trial sites and map pins indicate a single trial site. A trial site can represent one or more clinical trials. Zoom in for information about specific sites and individual clinical trials and use the options tab to filter results by intervention type. Clinical trial information as of November 3rd, 2014. Diabetes incidence data from 2011.